Locker



FIG. 1 is a front perspective view of a locker showing my new designwith parts shown in phantom lines for environmental purposes only;

FIG. 2 is a side view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a bottom view thereof.

The ornamental design for a locker, as shown and described.